About controls and objects

The AVEVA Historian Client controls can be categorized as either "application" controls, "building block" controls, or "core functionality" controls.

An application-level control runs within the container application, but functions as if it were a stand-alone application. This type of control does not require extensive scripting to function. Application-level controls include:

• aaHistClientTrend Control

• aaHistClientQuery Control

A building block control provides specific functionality for use within an application. Scripting is required to make these controls functional. Building block controls include:

• aaHistClientTimeRangePicker Control

• aaHistClientTagPicker Control

• aaHistClientSingleValueEntry Control

• aaHistClientActiveDataGrid Control

The following low-level controls and objects are used by either an application or building block control. Core functionality controls include:

• aaTag Object

• aaServer Object

• aaServers Object